Portland State University. Department of Earth Sciences
Angel G. Johnson
Date of Award
Master of Science (M.S.) in Earth Science
1 online resource; digitized manuscript
Gravity -- Oregon -- Portland Region, Faults (Geology) -- Oregon -- Portland region, Structural Faults (Geology), Structural Gravity -- Oregon -- Portland Region
The state gravity maps of Oregon and Washington show a gravity high centered south of Portland, Oregon and a gravity low in the Tualatin Valley to the west disrupting the regional gravity gradient which is controlled by crustal thickening. Detailed gravity surveys done in the Portland area are consistent with the state gravity maps but show considerably more detail. Quantitative interpretation of this data has provided new information on the subsurface structure in this area; recent work has yielded corroborative evidence for a fault zone bounding the east side of the Portland Hills, and has indicated the presence of faults under the Portland Basin to the east which were previously unknown.
Jones, Terry Dean, "Analysis of a Gravity Traverse South of Portland, Oregon" (1977). Dissertations and Theses. Paper 2616.